NOTES ON NOVA SCOTIAN ZOOLOGY PIERS. 267 



coloration from the older, viridescent one, that it was originally 

 considered an entirely distinct species under the name miniatus, 

 and even at one time was placed in a different subgenus. The 

 late Prof. Cope in 1859 expressed the opinion that miniatus 

 was only a state of viridescens, but it was not till a number of 

 years later that the whole process of transformation from 

 immature to mature pigmentation was observed in captive 

 animals and fully described. The red specimens are found 

 upon land, whereas the viridescent, full-grown form is aquatic 

 in habits. 



